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C4XL is at the top, a C3E at 66 ft and a C3E at 33 ft. All are "D" models. Phasing is done with a Stackmatch. The phasing line to the C4XD is approximately 4 feet longer to compensate for the driven element being about 5 feet ahead of the two C3Es (easy to calculate using the coax velocity factor, Jay at WX0B will help). Works FB with all three in phase, any two in phase and each alone. The lower two are mounted on side mounts made by Custom Metal Works. Very Heavy Duty. The C3s have enough room for side mounting on Rohn 45 so they would be fine for Rohn 25. If it were me, I would swap the C3SS for a C3 or C3E/D. Be sure to model the spacing to optimize the gain. Good luck! Ron Arnett N5XD > -----Original Message----- > From: Pete Smith [mailto:n4zr@contesting.com] > Sent: Wednesday, March 21, 2001 6:44 AM > To: force12talk@qth.com > Subject: Re: [Force 12 Talk] C3SS pictures? > > > At 05:33 AM 3/21/01 -0600, K0XM wrote: > >Neil, > >Mine is on a temporary 30 ft crank up tower, and I will take one > today and > >email it to you. > >While we are one the subject, has anyone side mounted a C3SS on > 25G as part > >of a stack? > >I am putting up 70-80 ft of 25G and am planning on getting a C4XL for the > >top, and would like to put the C3SS at 40ft on some kind of > rotor. It is a > >great of antenna, and would like to keep it up in the air as part of a > >stack. > > Presuming that the space between the 15 meter driven element and the 10 > meter reflector is >30 inches or so, you should be able to do it > mechanically -- the tricky part will be trimming the feedlines so that it > is properly phased with the C4XL, which has its somewhat different driven > element cell in the center, not at the end of the boom. You might be > better off just swapping it for a C-3, which has the same driven element > cell as the C-4XL, though you will still have a physical offset to contend > with. There's at least one person on the reflector who has successfully > stacked a C-4XL above a C-3, so let's invite him to enlighten us all on > what the solution is... > > 73, Pete N4ZR > Contesting is! > > The World Contest Station Database > is waiting for your input at > http://www.qsl.net/n4zr > > > > > -------------------------------------------- > Force12Talk mailing list provided as a service by Force 12 Antennas, Inc. > Force 12 Web site: http://www.qth.com/force12 > > Submissions: send to Force12Talk@qth.com > To unsubscribe: send a blank e-mail to Force12Talk-leave@qth.com > Force12Talk Message Archive: http://www.qth.com/force12/list/force12talk > For problems with the list, contact n4zr@qth.com > > > -------------------------------------------- Force12Talk mailing list provided as a service by Force 12 Antennas, Inc. Force 12 Web site: http://www.qth.com/force12 Submissions: send to Force12Talk@qth.com To unsubscribe: send a blank e-mail to Force12Talk-leave@qth.com Force12Talk Message Archive: http://www.qth.com/force12/list/force12talk For problems with the list, contact n4zr@qth.com |
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